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Finding the Fourth Proportional to 123,700.14, 170,629.47 and 108,580.86

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Solution

The fourth proportional to 123,700.14, 170,629.47 and 108,580.86 is: 149,774.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,700.14 : 170,629.47 = 108,580.86 : x
  2. Step 2: Convert to fraction form
    123,700.14/170,629.47 = 108,580.86/x
  3. Step 3: Cross multiply
    123,700.14x = 170,629.47 × 108,580.86
  4. Step 4: Simplify right side
    123,700.14x = 18,527,094,593.94
  5. Step 5: Solve for x
    x = 18,527,094,593.94/123,700.14
  6. Step 6: Final answer
    x = 149,774.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.